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Choosing ‘shortest’ will calculate the distance while trying to keep the distance travelled to a minimum. Choosing ‘quickest’ will take into account average speeds and calculate the route with the shortest time necessary. These parameters are only relevant when calculating the road travelled distances.

The dataset we have contains the average speed data for each road. This means that we can predict a journey time according to realistic travelling speed. Of course, the actual journey time will depend on the individual driver, the vehicle and road conditions at the time the journey is taken.